<template>
  <div>
    

      <!--图片分类滑动区域  -->
    <div id="slider" class="mui-slider">
      <div id="sliderSegmentedControl" class="mui-scroll-wrapper mui-slider-indicator mui-segmented-control mui-segmented-control-inverted">

        <div class="mui-scroll">
          <a :class="['mui-control-item', item.id == 0 ? 'mui-active' : '']" v-for="item in cate" :key="item.id" @tap="getPhotoListById(item.id)">
            {{ item.title }}
          </a>
        </div>
      </div>
    </div>


    <!-- 图片懒加载区域 -->
    <ul class="lz-ul">
      <router-link v-for="item in list" :key="item.id" :to="'/home/photoinfo/' + item.id" tag="li">
        <img v-lazy="item.img_url">
        <div class="info">
          <h1 class="info-title">{{ item.title }}</h1>
          <div class="info-body">{{ item.zhaiyao }}</div>
        </div>
      </router-link>
    </ul>

  </div>
</template>
<script>
//实现滑动插件，需要借助mui脚本
import mui from '../../lib/mui/js/mui.min.js';
export default {
    data() {
        return {
            cate: [],  //所有分类数组
            list: []   //所有图片列表
        }
    },
    created () {
        this.getPhotoList();
        this.getPhotoListById(0);
    },
    mounted() {
    // mounted 中，可以进行页面中 DOM 的操作，这时候，DOM已经是最新的，同时也挂载到了页面中；
    // 如果在一个组件中，要操作 DOM 了，最好在 mounted 中操作；
    // 当页面的组件，被挂载到 网页中，会执行 mounted
    mui(".mui-scroll-wrapper").scroll({
      deceleration: 0.0005 //flick 减速系数，系数越大，滚动速度越慢，滚动距离越小，默认值0.0006
    });
    },
    methods: {
        getPhotoList() {
            this.$http.get("api/getimgcategory").then(result=> {
                if(result.body.status === 0) {

                    console.log(result.body);
                    result.body.message.unshift({ title: "全部", id: 0 });

                    this.cate = result.body.message;
                }
            })
        },
        getPhotoListById(id) {
            this.$http.get("api/getimages/"+ id).then(result=> {
                if(result.body.status === 0) {
                    this.list = result.body.message;
                }
            })
        }
    }
}



</script>

<style lang="scss" scoped>
* {
  touch-action: pan-y;
}

.lz-ul {
  list-style: none;
  padding: 10px;
  padding-bottom: 0;
  margin: 0;
  li {
    background-color: #ccc;
    text-align: center;
    margin-bottom: 10px;
    box-shadow: 0 0 6px #999;
    position: relative;
    img {
      width: 100%;
      display: block;
    }
    img[lazy="loading"] {
      width: 40px;
      height: 300px;
      margin: auto;
    }

    .info {
      position: absolute;
      bottom: 0;
      color: white;
      text-align: left;
      background-color: rgba(0, 0, 0, 0.4);
      max-height: 84px;
      .info-title {
        font-size: 14px;
      }
      .info-body {
        font-size: 13px;
      }
    }
  }
}
</style>
